---
title: "Transaction required signers"
method: GET
path: "/txs/{hash}/required_signers"
tags: ["Cardano » Transactions"]
---

# Transaction required signers

`GET /txs/{hash}/required_signers`

Obtain the extra transaction witnesses.

## Path parameters

- `hash` string, 64-character case-sensitive hexadecimal string., required

## Response `200`

Query required signers (extra transaction witnesses)

- object[]
  - `witness_hash` string, required — Hash of the witness

## Other responses

- `400` — Bad request
- `403` — Authentication secret is missing or invalid
- `404` — Component not found
- `418` — IP has been auto-banned for extensive sending of requests after usage limit has been reached
- `429` — Usage limit reached
- `500` — Internal Server Error

---

[API](https://skmtc.net/txpipe/apis/blockfrost-io-api-documentation.md) · [All operations](https://skmtc.net/txpipe/apis/blockfrost-io-api-documentation/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/txpipe/blockfrost-io-api-documentation/versions/4a2f67b16876/schema)